Re-add syntax highlighting to daily emails and

...ATDC lessons

source/_daily_emails/2023-11-26.md

@@ -19,7 +19,7 @@ Unfortunately, they're often overused and are outdated compared to the code they
 
 For example, here's some PHP code:
 
-```php
+```language-php
 function sayHello(string $name, array $options = ['shout' => false]): void {
      echo 'Hello, ' . $name;
 }
@@ -53,7 +53,7 @@ Then you'll get this error:
 
 Now, we can use a docblock to provide more information to PHPStan to describe the structure of the `$options` array and that it has strings for keys and boolean values.
 
-```php
+```language-php
 /**
  * @param array<string, bool> $options
  */
@@ -61,7 +61,7 @@ Now, we can use a docblock to provide more information to PHPStan to describe th
 
 Although it's not erroring, we can add the `$name` parameter and declare it as a `string`.
 
-```php
+```language-php
 /**
  * @param string $name
  * @param array<string, bool> $options
@@ -78,7 +78,7 @@ We don't want an empty string for a name and want the correct options and values
 
 Let's change the docblock to this:
 
-```php
+```language-php
 /**
  * @param non-empty-string $name
  * @param array{shout: bool} $options